Postage stamps and postal history of the United States - Wikipedia
Postage stamps and postal history of the United States - Wikipedia
File:Stamp US 1962 4c Dag Hammarskjold invert.jpg - Wikipedia
File:First US Stamps 1847 Issue.jpg - Wikipedia
U.S. 1847 issue from Gross collection in Oct. 27-29 Siegel auction
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File:First US Stamps 1847 Issue.jpg - Wikipedia
Classic Period (1847-1893)
Classic Period (1847-1893)